They certainly do not become sumo wrestlers. That Peter Crouch What goes on in a footballer's dressing room? It could mean an end to donor waiting lists, and an end to problems of organ rejection. Those iPS cells can then be injected into a pig embryo. To me, it looks more like intestines - but he assures me this is what a pig's uterus looks like. They are chimeric, that is, they carry genetic material from two different species. Those who are obviously do not dare to show themselves in polite society outside the cooler months. These are external links and will open in a new window. The Japanese team then introduce stem cells from a black pig into the embryo.